This name is a synonym of Dudleya variegata (S.Watson) Moran.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 8902546) with original publication details: Proc. Amer. Acad. Arts 11: 137 1876.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:276223-1.
This name was in version 1 of The Plant List, record tro-8902546, and has not been changed.